WO2012029447A1 - Reclaiming apparatus and reclaiming method - Google Patents
Reclaiming apparatus and reclaiming method Download PDFInfo
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- WO2012029447A1 WO2012029447A1 PCT/JP2011/066968 JP2011066968W WO2012029447A1 WO 2012029447 A1 WO2012029447 A1 WO 2012029447A1 JP 2011066968 W JP2011066968 W JP 2011066968W WO 2012029447 A1 WO2012029447 A1 WO 2012029447A1
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- Prior art keywords
- absorption liquid
- reclaiming
- absorbent
- vapor
- stored
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Definitions
- the present invention relates to a reclaiming apparatus and a reclaiming method for removing deteriorated substances contained in an absorption liquid that absorbs CO 2 or H 2 S in a gas.
- Patent Document 1 discloses a method for removing CO 2 (carbon dioxide) and SOx (sulfur oxide) in exhaust gas.
- This method includes a denitration step of reducing NOx (nitrogen oxides) contained in exhaust gas to perform a denitration process, a desulfurization step of contacting SOx contained in the exhaust gas with calcium carbonate in a slurry, a denitration process, absorption and de CO 2 step by countercurrent contact to absorb CO 2 in the exhaust gas to the absorbing liquid in the desulfurization treated exhaust amine absorbing solution in the absorption tower (aqueous alkanolamine solution), the CO 2 in a regeneration tower An absorption liquid regeneration step for converting the rich solution into a lean solution from which CO 2 has been removed and returning it to the absorption tower.
- NOx nitrogen oxides
- the alkanolamine is oxidized and deteriorated by oxygen in the exhaust gas, or the heat-stable salt generated by the reaction of the alkanolamine with residual NOx or residual SOx, the dust contained in the exhaust gas, etc.
- reclaiming is performed to remove the deteriorating substances from the absorbing liquid by heating the absorbing liquid with a reclaimer and concentrating the deteriorating substances as sludge. Is going.
- the absorbent containing the deteriorated product is heated, and the deteriorated product is concentrated and recovered as sludge, and the absorbent component is returned to the regeneration tower as vapor. It is possible to prevent a situation in which deteriorated products are accumulated.
- the absorption liquid component does not evaporate and remains in the sludge. For this reason, the absorbing solution is lost, and the lost amount of absorbing solution must be replenished.
- the absorption liquid component remaining in the sludge may reach approximately 5% to 20% of the entire absorption liquid.
- This invention solves the subject mentioned above, and aims at providing the reclaiming apparatus and the reclaiming method which can isolate
- an absorption liquid reservoir that stores a part of the absorption liquid that has absorbed CO 2 or H 2 S in the gas, and the absorption liquid storage section are stored.
- a heating unit for heating the absorption liquid a part of the absorption liquid stored in the absorption liquid storage part is circulated, and a gas is brought into countercurrent contact with the absorption liquid flowing through the reclaiming apparatus.
- the gas is brought into counter-current contact with a part of the absorption liquid stored in the absorption liquid storage part, so that the absorption liquid component volatilizes and is separated from the deterioration product, so that the absorption liquid component from the deterioration product Can be taken out and the loss of the absorbent can be reduced.
- the absorbing liquid starts to be heated from about 120 [° C.], and the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product. For this reason, higher pressure steam is required at the heating source of the heating section.
- the absorption liquid component of an absorption liquid may deteriorate with the heat accompanying a raise of heating temperature.
- the absorbent is separated from the deteriorated product by bringing the absorbent and gas stored in the absorbent storing part into countercurrent contact with each other, so that the deteriorated product is concentrated.
- the heating temperature for concentrating the deteriorated product can be suppressed, and the pressure of the steam of the heating source of the heating unit can be suppressed. Moreover, since the heating temperature can be suppressed, the amount of the absorbent component that deteriorates due to heating can be reduced. Furthermore, since the deteriorated product can be concentrated while suppressing the heating temperature in the heating unit, the efficiency of the operation of concentrating the deteriorated product is improved, so that the reclaiming apparatus itself can be downsized.
- an absorption liquid circulation part that forms a circulation mechanism for extracting a part of the absorption liquid stored in the absorption liquid storage part and returning it to the absorption liquid storage part, and the heating part.
- a vapor supply unit that generates steam from the heated absorption liquid, and an absorption liquid component that is provided in the absorption liquid storage unit and that makes the absorption liquid returned to the absorption liquid storage unit counter-contact with the vapor of the vapor supply unit And an extraction part.
- the process of concentrating the deteriorated product by using the vapor of the absorbent heated by the heating unit for concentrating the deteriorated product contained in the absorbent, and the process of separating the absorbent component from the deteriorated product Can be performed with the same heat source, and the equipment cost can be reduced.
- the absorption liquid circulation section and the steam supply section can use the configurations of the absorption liquid storage section and the heating section, so that the equipment cost can be reduced.
- the reclaiming device of the present invention is characterized in that it includes a dry vapor supply unit that supplies dry vapor having a temperature higher than the temperature at which the absorbent is heated to the absorbent storage unit.
- the absorbent component is further volatilized to be reliably separated from the deteriorated product.
- the absorption liquid component can be further extracted from the deteriorated product, and the loss of the absorption liquid can be reduced.
- an absorption liquid circulation part that extracts and distributes a part of the absorption liquid stored in the absorption liquid storage part, and a vapor supply part that supplies vapor generated outside the reclaiming apparatus; And an absorption liquid component extraction section for bringing the absorption liquid extracted in the absorption liquid circulation section into countercurrent contact with the vapor of the vapor supply section.
- the efficiency of separating the absorbing liquid component from the deteriorated product can be improved by using the steam not containing the absorbing liquid component.
- the reclaiming device of the present invention supplies an absorption liquid circulation section that extracts and distributes a part of the absorption liquid stored in the absorption liquid storage section, and the gas that absorbs CO 2 or H 2 S.
- the absorbent component can be separated from the deteriorated product by using the gas that is generated outside the reclaiming device and absorbs CO 2 or H 2 S.
- the reclaiming apparatus of the present invention is further characterized by further comprising a packed bed for bringing the absorbing liquid and the vapor into gas-liquid contact.
- a part of the absorption liquid is extracted from the absorption liquid storage unit and lifted, and the absorption liquid lifted by the pump is caused to flow down against the rising vapor. And a nozzle.
- the countercurrent contact between the absorption liquid stored in the absorption liquid storage section and the vapor can be appropriately performed.
- a step of storing a part of the absorption liquid that has absorbed CO 2 or H 2 S in the gas, and a step of heating the stored absorption liquid includes a step of countercurrent contact with a gas while circulating a part of the stored absorption liquid.
- the absorption liquid component volatilizes and is separated from the deterioration product. Can be taken out and the loss of the absorbent can be reduced.
- the absorbing liquid starts to be heated from about 120 [° C.], and the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product.
- the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product.
- the absorption liquid component of an absorption liquid may deteriorate with the heat accompanying a raise of heating temperature.
- the absorbent is separated from the deteriorated product by bringing the absorbent and gas stored in the absorbent storing part into countercurrent contact with each other, so that the deteriorated product is concentrated.
- the heating temperature for concentrating the deteriorated product can be suppressed, and the pressure of the steam of the heating source can be suppressed. Moreover, since the heating temperature can be suppressed, the amount of the absorbent component that deteriorates due to heating can be reduced. Furthermore, since the deteriorated product can be concentrated while suppressing the heating temperature, the efficiency of the work of concentrating the deteriorated product is improved, so that the reclaiming apparatus can be downsized.
- a part of the stored absorption liquid is circulated to distribute the absorption liquid, and the vapor of the heated absorption liquid and the circulated absorption liquid are countercurrent contacted. And a step of allowing
- a process of concentrating the deteriorated product by using the vapor of the heated absorbent solution to concentrate the deteriorated product contained in the absorbent, and a process of separating the absorbent component from the deteriorated product Can be performed with the same heat source, and the equipment cost can be reduced.
- the reclaiming method of the present invention is characterized in that it includes a step of countercurrently contacting a partially circulated absorbing liquid with dry steam having a temperature higher than the temperature at which the absorbing liquid is heated.
- the dry steam is brought into countercurrent contact with a part of the absorbing liquid, so that the absorbing liquid component is further separated from the deteriorated product by further volatilizing the absorbing solution component. It can be taken out and the loss of the absorbent can be reduced.
- the reclaiming method of the present invention includes a step of extracting and circulating a part of the stored absorption liquid, and a step of countercurrently contacting the vapor generated outside with the extracted absorption liquid. It is characterized by.
- the efficiency of separating the absorbent component from the deteriorated product can be improved by using the steam not containing the absorbent component.
- the reclaiming method of the present invention includes a step of extracting and circulating a part of the stored absorption liquid, and counter-flowing the gas in which CO 2 or H 2 S is absorbed to the extracted absorption liquid. And a step of contacting.
- the absorbent component can be separated from the deteriorated product by using a gas that is generated outside the reclaiming device and absorbs CO 2 or H 2 S.
- the stored absorption liquid is sampled and the amount of the absorption liquid component in the absorption liquid is measured, and when the measured amount of the absorption liquid component reaches a predetermined amount or less, And a step of ending the process.
- the absorption function by the absorbing liquid can be always maintained in a stable state by terminating the reclaiming based on the amount of the absorbing liquid component in the stored absorbing liquid.
- the step of heating the stored absorption liquid includes the step of exchanging heat between the absorption liquid and steam in a non-contact manner and maintaining the vapor pressure of the vapor at a predetermined pressure.
- the vapor pressure of the steam for heating the stored absorption liquid is kept at a predetermined pressure
- the vapor pressure of the heating source can be kept constant, so the amount of the absorption liquid component that deteriorates due to heating. It is possible to reduce the size of the reclaiming device.
- the vapor pressure of the vapor is maintained at 2 to 3 [kg / cm 2 G].
- the present invention it is possible to further separate the absorbent component and the deteriorated product and reduce the loss of the absorbent.
- FIG. 1 is a schematic diagram of a recovery apparatus to which a reclaiming apparatus according to Embodiment 1 of the present invention is applied.
- FIG. 2 is a schematic diagram of the reclaiming apparatus according to Embodiment 1 of the present invention.
- FIG. 3 is an explanatory view of the operation of the reclaiming device according to the first embodiment of the present invention.
- FIG. 4 is a block diagram of a control system of the reclaiming apparatus according to Embodiment 1 of the present invention.
- FIG. 5 is a flowchart of control of the reclaiming device according to Embodiment 1 of the present invention.
- FIG. 6 is a schematic diagram of a reclaiming device according to Embodiment 2 of the present invention.
- FIG. 1 is a schematic diagram of a recovery apparatus to which a reclaiming apparatus according to Embodiment 1 of the present invention is applied.
- FIG. 2 is a schematic diagram of the reclaiming apparatus according to Embodiment 1 of the present invention.
- FIG. 7 is an explanatory diagram of the operation of the reclaiming device according to the second embodiment of the present invention.
- FIG. 8 is a block diagram of a control system of the reclaiming apparatus according to Embodiment 2 of the present invention.
- FIG. 9 is a flowchart of control of the reclaiming apparatus according to Embodiment 2 of the present invention.
- FIG. 10 is a schematic diagram of a reclaiming device according to Embodiment 3 of the present invention.
- FIG. 11 is a schematic diagram of a reclaiming device according to Embodiment 4 of the present invention.
- FIG. 12 is a chart showing the reclaiming test results according to the example of the present invention.
- Coal gasification gas, synthesis gas, coke oven gas, petroleum gas, natural gas and the like include CO 2 (carbon dioxide) and H 2 S (hydrogen sulfide).
- CO 2 (carbon dioxide) and H 2 S (hydrogen sulfide) and a recovery device that recovers CO 2 (carbon dioxide) from combustion exhaust gas are shown in FIG. 2, for example, a cooling tower 102 that cools exhaust gas 1001 discharged from industrial equipment 101 such as a boiler with cooling water 1002, and an amine-based absorbent such as an alkanolamine aqueous solution that absorbs CO 2 in the exhaust gas 1001.
- a liquid absorbent 1003 (lean solvent 1003a) is contacted countercurrently by absorbing the CO 2 in the flue gas 1001 to the absorption solution 1003, and the absorption tower 103 for discharging the flue gas 1001 to remove CO 2, has absorbed CO 2 And a regeneration tower 104 for regenerating the absorbing solution 1003 (rich solution 1003b).
- the exhaust gas 1001 containing CO 2 is pressurized by the exhaust gas blower 102a and then sent into the cooling tower 102 where it is cooled in countercurrent contact with the cooling water 1002 (exhaust gas cooling step).
- the cooling water 1002 is collected in the lower part in the cooling tower 102, and is supplied to the upper part in the cooling tower 102 via the cooling water pipe 102c outside the cooling tower 102 by the humidified cooling water circulation pump 102b.
- the cooling water 1002 is in countercurrent contact with the exhaust gas 1001 in the process of reaching the lower part in the cooling tower 102.
- the cooling water pipe 102c is provided with a cooler 102d for cooling the cooling water 1002.
- the cooled exhaust gas 1001 is discharged from the cooling tower 102 through the exhaust gas pipe 102e and supplied to the absorption tower 103.
- the exhaust gas 1001 is brought into counter-current contact with the alkanolamine-based absorption liquid 1003 (lean solution 1003a), and the CO 2 in the exhaust gas 1001 is absorbed by the absorption liquid 1003. Thereby, CO 2 is removed from the exhaust gas 1001 (de-CO 2 step).
- the exhaust gas 1001 from which CO 2 has been removed is discharged from the absorption tower 103.
- the absorption liquid 1003 (lean solution 1003a) is pumped from the regeneration tower 104 by the absorption liquid supply pump 103a, and is supplied to the upper part of the absorption tower 103 from the outside of the absorption tower 103 via the lean solution pipe 103b.
- the absorbent 1003 makes countercurrent contact with the exhaust gas 1001 in the course of reaching the lower part of the absorption tower 103.
- the lean solution tube 103b is provided with a cooler 103c for cooling the absorbent 1003 supplied to the absorption tower 103.
- the absorption liquid 1003 (rich solution 1003b) that has absorbed CO 2 accumulates in the lower part of the absorption tower 103, is discharged to the outside of the absorption tower 103 through the rich solution pipe 104b, and is pumped by the absorption liquid discharge pump 104a while being regenerated. It is supplied to the upper part in 104.
- the rich solution 1003b of the absorption liquid 1003 is a semi-lean solution in which most of CO 2 is released by an endothermic reaction, and this semi-lean solution reaches almost the bottom in the regeneration tower 104. Let it be a lean solution 1003a from which CO 2 has been removed.
- the lean solution 1003a is heated and regenerated by saturated steam 1004a in the regeneration heater 104c. Then, the regenerated lean solution 1003a is discharged to the outside of the regeneration tower 104 through the lean solution pipe 103b and supplied to the absorption tower 103.
- the rich lean lean heat exchanger 105 passes through the rich solution pipe 104b. It is cooled by exchanging heat with the rich solution 1003b in the process of being supplied to the regeneration tower 104 (absorbing liquid regeneration step).
- the CO 2 gas separated from the rich solution 1003b and the semi-lean solution is in contact with the reflux water 1005 pumped by the reflux water pump 104d from the outside of the regeneration tower 104, and It is discharged from the top to the outside of the regeneration tower 104 through the reflux tube 104e.
- the CO 2 gas is cooled by the regeneration tower reflux condenser 104f, and then the water vapor is condensed by the CO 2 separator 104g and separated from the reflux water 1005, and the recovered CO 2 discharge pipe 104h. This leads to a CO 2 recovery process.
- the reflux water 1005 separated from the CO 2 by the CO 2 separator 104g is pumped by the reflux water pump 104d and supplied to the regeneration tower 104 through the reflux pipe 104e.
- a denitration apparatus that performs a denitration process in which NOx (nitrogen oxide) contained in the exhaust gas 1001 is reduced and denitration treatment is performed between the industrial equipment 101 and the cooling tower 102 of the recovery apparatus.
- a desulfurization apparatus for performing a desulfurization process in which SOx (sulfur oxide) contained in the exhaust gas 1001 is brought into contact with calcium carbonate in the slurry for desulfurization.
- the recovery device includes a reclaiming device 106 for reclaiming as a sludge (concentrated waste) 1006 obtained by heating and condensing a deteriorated product remaining in the lean solution 1003a generated in the regeneration tower 104.
- the reclaiming device 106 extracts and stores the lean solution 1003a from the lean solution tube 103b before reaching the rich / lean heat exchanger 105 from the regeneration tower 104, and heats the lean solution 1003a to, for example, 120 [° C.] to 150 [° C.]
- the absorbing liquid 1003 vaporized from the solution 1003a is returned to the lower part of the regeneration tower 104, while the sludge 1006 concentrated by heating is discharged.
- the reclaiming device 106 mainly includes an absorption liquid storage unit and a heating unit.
- the absorption liquid storage unit is configured as a sealed container 106 a that extracts and stores a part of the absorption liquid 1003 obtained by collecting CO 2 from the exhaust gas 1001.
- the sealed container 106a is connected to the position of the lean solution pipe 103b from the regeneration tower 104 to the rich / lean heat exchanger 105 through the extraction pipe 106b.
- the extraction pipe 106b is provided with an open / close valve V1.
- a water supply pipe 106c that sends dilution water 1007 is connected to the sealed container 106a.
- the water supply pipe 106c is provided with an on-off valve V2.
- a sludge discharge pipe 106d for discharging the sludge 1006 is connected to the sealed container 106a.
- the sludge discharge pipe 106d is provided with an on-off valve V3 and a sludge discharge pump 106e.
- an absorbent discharge pipe 106f connected to the lower part of the regeneration tower 104 is connected to the upper part of the sealed container 106a.
- the absorption liquid discharge pipe 106f is provided with an on-off valve V4.
- the heating unit is provided inside the sealed container 106a, and is generated by being heated by a horizontal U-shaped steam pipe 106g, one end of each steam pipe 106g, and a heating source (not shown) outside the sealed container 106a.
- a steam supply pipe 106h that supplies saturated steam 1004b and a steam discharge pipe 106i that is connected to the other end of each steam pipe 106g and discharges the saturated steam 1004b to the outside of the sealed container 106a.
- the steam supply pipe 106h is provided with an on-off valve V5.
- the reclaiming device 106 opens the on-off valve V1 to supply the lean solution 1003a to the inside of the sealed container 106a, and opens the on-off valve V2 to supply dilution water 1007 to the inside of the sealed container 106a. Is opened, and saturated steam 1004b is passed through the steam pipe 106g, whereby the supplied lean solution 1003a and dilution water 1007 are heated by, for example, contactless heat exchange at 120 to 150 ° C. Then, the deteriorated material contained in the lean solution 1003a is concentrated as sludge 1006 at the bottom of the sealed container 106a.
- the sludge 1006 is discharged outside the sealed container 106a by opening the on-off valve V3 and operating the sludge discharge pump 106e, and is recovered outside the system of the recovery device.
- the collected sludge 1006 is incinerated.
- the lean solution 1003a and the dilution water 1007 are evaporated by heating.
- the evaporated lean solution 1003a passes through the open on-off valve V4, and is returned to the regeneration tower 104 through the absorbent discharge pipe 106f. As a result, it is possible to separate the deteriorated substances contained in the lean solution 1003a and prevent the deteriorated substances from accumulating in the system of the recovery device.
- the absorbing liquid component extraction portion 106j, the nozzle 106k, the absorbing liquid extraction pipe 106m, the on-off valve V6, the extraction pump 106n, and the filling A layer 106p is provided.
- the absorbent component extraction part 106j is provided on the upper part of the sealed container 106a.
- the absorbing liquid component extraction part 106j is formed to bulge upward from the upper part of the sealed container 106a so that the lower part communicates with the sealed container 106a and the top part is closed to form a part of the sealed container 106a.
- the absorption liquid discharge pipe 106f is connected to the top of the absorption liquid component extraction part 106j.
- the nozzle 106k is provided in the upper part in the absorbing liquid component extraction portion 106j.
- the nozzle 106k is connected to the bottom of the hermetic container 106a via an absorbing liquid extraction pipe 106m.
- the absorbing liquid extraction pipe 106m is provided with an on-off valve V6 and an extraction pump 106n.
- the packed layer 106p is provided below the nozzle 106k in the absorbing liquid component extraction portion 106j.
- This reclaiming device 106 opens the on-off valve V6 and operates the extraction pump 106n, whereby a part of the deteriorated lean solution 1003a is discharged from the sealed container 106a through the absorbing liquid extraction pipe 106m to the nozzle 106k. And is sprayed and flows down from the nozzle 106k into the absorption liquid component extraction portion 106j. That is, the absorption liquid component is extracted while extracting a part of the CO 2 absorption liquid 1003 stored in the sealed container 106a as the absorption liquid storage section by the absorption liquid extraction pipe 106m, the on-off valve V6, the extraction pump 106n, and the nozzle 106k.
- the absorbing liquid circulation part 1 is configured that constitutes a circulation mechanism that returns to the sealed container 106a through the extraction part 106j.
- the lean solution 1003a stored in the sealed container 106a rises as a vapor and reaches the absorption liquid component extraction unit 106j. It reaches. Then, the rising vapor of the lean solution 1003a makes countercurrent contact with the lean solution 1003a flowing down from the nozzle 106k at the position of the packed bed 106p.
- the hermetic container 106a, the steam pipe 106g, the steam supply pipe 106h, the steam discharge pipe 106i, and the on-off valve V5 are opposed to the flowing direction of the absorbing liquid 1003 by the absorbing liquid circulating section 1 in the absorbing liquid component extracting section 106j.
- a steam supply unit 2 for supplying steam is configured.
- the lean solution 1003a flowing down from the nozzle 106k comes into countercurrent contact with the vapor of the lean solution 1003a rising from the sealed container 106a, so that the absorption liquid component volatilizes. That is, as shown in FIG. 3A, the rising vapor reaches from the lower region to the upper region and comes into countercurrent contact with the absorption liquid 1003 (lean solution 1003a), so that the absorption liquid component contained in the gas phase. (Amine) is volatilized and extracted from the absorbing solution 1003 (lean solution 1003a). On the other hand, as shown in FIG.
- the absorbing liquid 1003 (lean solution 1003a) that flows down reaches from the upper area to the lower area and comes into countercurrent contact with the vapor, so that the absorbing liquid component contained in the liquid phase (Amine) volatilizes and separates from the degraded product.
- the volatilized absorption liquid component is separated from the deteriorated material, passes through the open on-off valve V4, and returns to the regeneration tower 104 through the absorption liquid discharge pipe 106f.
- the packed bed 106p brings the lean solution 1003a flowing down from the nozzle 106k into vapor-liquid contact with the vapor of the lean solution 1003a rising in the absorbent component extraction portion 106j from the sealed container 106a to volatilize the absorbent component. It is suitable for separating from deteriorated materials.
- the packed layer 106p includes a packed layer structure filled with a filler such as a ball ring or a cascade ring. Although it is more preferable that the packed bed 106p is provided, the lean solution 1003a that flows down from the nozzle 106k and the vapor of the lean solution 1003a that rises in the absorbing liquid component extraction portion 106j from the sealed container 106a are provided even if not provided. By making countercurrent contact, it is possible to separate the absorption liquid component from the deteriorated product.
- the reclaiming apparatus 106 includes a recovery unit 106q that recovers (samples) a part of the absorbent 1003 (lean solution 1003a) stored in the sealed container 106a.
- the recovery unit 106q is connected to the subsequent stage of the extraction pump 106n in the absorbing liquid extraction pipe 106m.
- the recovery unit 106q is provided with a measurement unit 106r that measures the amount of the absorption liquid component in the recovered absorption liquid 1003 (lean solution 1003a).
- the measurement information measured by the measurement unit 106r is output to the control unit 106s. Note that the sampling of the absorbing liquid 1003 (lean solution 1003a) is not limited to the absorbing liquid extraction pipe 106m, and may be collected from the sealed container 106a.
- the control unit 106s is composed of a microcomputer or the like. As shown in FIG. 4, the control unit 106s is provided with a storage unit 106t.
- the storage unit 106t includes a RAM, a ROM, and the like, and stores programs and data.
- data of the amount of the absorption liquid component in the absorption liquid 1003 (lean solution 1003a) stored in the sealed container 106a is stored in order to operate the reclaiming device. In this data, for example, the absorption liquid component amount in the absorption liquid 1003 (lean solution 1003a) is set to 5 [wt%].
- This setting is an index indicating how much the absorption liquid component has decreased from the absorption liquid 1003 (lean solution 1003a) stored in the sealed container 106a, and can be arbitrarily set.
- the measuring unit 106r, the on-off valves V1 to V6, and the pumps 106e and 106n are connected to the control unit 106s.
- the control unit 106s comprehensively controls the on-off valves V1 to V6 and the pumps 106e and 106n according to programs and data stored in advance in the storage unit 106t based on the concentration information input from the measurement unit 106r.
- the control unit 106s opens the on-off valves V1, V2, V4 to V6 and operates the extraction pump 106n based on the reclaiming start command (step S1). As a result, a part of the absorption liquid 1003 (lean solution 1003a) reaches the sealed container 106a from the regeneration tower 104, is heated together with the dilution water 1007, evaporates, and returns to the regeneration tower 104 through the absorption liquid discharge pipe 106f.
- the countercurrent contact vaporizes and returns to the regeneration tower 104 through the absorbent discharge pipe 106f. As a result, it is possible to separate the absorption liquid component from the deteriorated material and take it out.
- the control unit 106s has an absorption liquid component amount in the absorption liquid 1003 (lean solution 1003a) of the sealed container 106a equal to or less than a predetermined amount (for example, 5 [wt%]).
- a predetermined amount for example, 5 [wt%].
- the on-off valves V1, V2, V4 to V6 are closed and the extraction pump 106n is stopped to complete the reclaiming (step S3).
- the on / off valve V3 is opened and the sludge discharge pump 106e is operated to discharge the sludge 1006 to the outside of the sealed container 106a.
- the sealed container 106a which is an absorbent storing part that stores a part of the absorbent 1003 that has absorbed the CO 2 in the exhaust gas 1001, and the sealed container 106a are stored. And a heating unit that heats the absorbed liquid 1003. A part of the absorbed liquid 1003 stored in the sealed container 106a is circulated, and vapor (gas) is brought into countercurrent contact with the circulated absorbent liquid 1003.
- the absorbing liquid component volatilizes and is separated from the deteriorated substance.
- the components can be taken out, and the loss of the absorbing liquid 1003 can be reduced.
- the absorption liquid 1003 starts to be heated from about 120 [° C.], and the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product.
- the steam pressure passed through the steam pipe 106g which is a heating unit, must be increased, and higher pressure steam is required at the heating source.
- the alkanolamine, which is the absorbent component of the absorbent 1003 may be deteriorated by the heat accompanying the increase in the heating temperature.
- the absorbent 1003 stored in the sealed container 106a is brought into countercurrent contact with the vapor to separate the absorbent component from the deteriorated product, so that the deterioration is caused. Since the product is concentrated, the heating temperature for concentrating the deteriorated product is suppressed, and the pressure rise in the heating unit is suppressed, so that the steam pressure of the heating source can be suppressed. Moreover, since the heating temperature can be suppressed, it is possible to reduce the amount of the absorbent component that deteriorates due to heating. Furthermore, since the deteriorated product can be concentrated while suppressing the heating temperature in the heating unit, the efficiency of the operation of concentrating the deteriorated product is improved, so that the reclaiming device 106 itself can be downsized.
- the absorption liquid circulation unit 1 that forms a circulation mechanism for extracting a part of the absorption liquid 1003 stored in the sealed container 106a and returning it to the sealed container 106a, and heating by the heating unit.
- a vapor supply unit 2 that generates vapor from the absorbed liquid 1003, and an absorption liquid component extraction unit 106j that is provided in the sealed container 106a and makes the absorption liquid 1003 returned to the sealed container 106a counter-contact with the vapor of the vapor supply unit 2; Is provided.
- the reclaiming device 106 by using the vapor of the absorbing liquid 1003 heated by the heating unit for concentrating the deteriorated substance contained in the absorbing liquid 1003, the process of concentrating the deteriorated substance and the absorbing liquid component from the deteriorated substance are performed.
- the separation process can be performed with the same heat source, and the equipment cost can be reduced.
- steam supply part 2 can utilize the structure of the airtight container 106a and a heating part, it is possible to reduce installation cost.
- the reclaiming device 106 further includes a packed bed 106p that brings the absorbent 1003 circulated by the absorbent circulator 1 into vapor-liquid contact.
- the reclaiming device 106 it is possible to promote the separation of the absorbent component from the deteriorated product contained in the absorbent 1003.
- the absorbing liquid circulation unit 1 extracts a part of the absorbing liquid 1003 from the sealed container 106a and lifts the absorbing pump 106n and the absorbing pump lifted by the extracting pump 106n. And a nozzle 106k that causes the liquid 1003 to flow down against the rising vapor.
- the reclaiming device 106 it is possible to appropriately make countercurrent contact between the absorbing liquid 1003 stored in the sealed container 106a and the steam.
- the measurement unit 106r that measures the amount of the absorption liquid component in the absorption liquid 1003 stored in the sealed container 106a, and the amount of the absorption liquid component obtained from the measurement unit 106r is equal to or less than a predetermined amount.
- the control unit 106s is further provided to terminate the reclaiming.
- the reclaiming is terminated based on the amount of the absorbing liquid component in the absorbing liquid 1003 stored in the sealed container 106a, so that the absorption function of the absorbing liquid 1003 can be always maintained in a stable state. Is possible.
- the on-off valves V1, V2, V4 to V6 are opened and the extraction pump 106n is operated at the start of reclaiming. For this reason, the heat evaporation of the absorbent 1003 (lean solution 1003a) and the volatilization of the absorbent component can be performed simultaneously, so that the efficiency of the reclaiming operation can be improved.
- the on-off valves V1, V2, V4, and V5 are opened to heat and evaporate the absorbent 1003 (lean solution 1003a), and then the on-off valve V6 is opened and removed.
- the pump 106n may be operated to volatilize the absorption liquid component. In this way, for example, when the absorption liquid 1003 (lean solution 1003a) is heated, the absorption liquid 1003 containing 3 [wt%] of the absorption liquid component absorbs 5 [wt%] after the heat evaporation.
- the reclaiming method according to Embodiment 1 includes a step of storing a part of the absorbent 1003 that has absorbed CO 2 in the exhaust gas 1001 and a step of heating the stored absorbent 1003. It includes a step of making countercurrent contact with the vapor (gas) while circulating a part of the liquid 1003.
- the vapor is counter-contacted with a part of the stored absorbent 1003, so that the absorbent component is volatilized and separated from the deteriorated product. It is possible to reduce the loss of the absorbent 1003.
- the absorbent 1003 starts to be heated from about 120 [° C.], and the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product. For this reason, the steam pressure passed through the steam pipe 106g, which is a heating unit, must be increased, and higher pressure steam is required at the heating source. Further, the alkanolamine, which is the absorbent component of the absorbent 1003, may be deteriorated by the heat accompanying the increase in the heating temperature.
- the stored absorbent liquid 1003 and the vapor are brought into countercurrent contact to separate the absorbent component from the deteriorated product, so that the deteriorated product is concentrated. Therefore, the heating temperature for concentrating the deteriorated product can be suppressed, and the pressure increase in the heating unit can be suppressed, so that the steam pressure of the heating source can be suppressed. Moreover, since the heating temperature can be suppressed, it is possible to reduce the amount of the absorbent component that deteriorates due to heating. Furthermore, since the deteriorated product can be concentrated while suppressing the heating temperature in the heating unit, the efficiency of the work of concentrating the deteriorated product is improved, and the reclaiming device can be downsized.
- the step of circulating a part of the stored absorbent 1003 to circulate the absorbent 1003 and the vapor of the heated absorbent 1003 and the circulated absorbent 1003 are directed. Fluid contact.
- the process of concentrating the deteriorated product and the absorbent component are separated from the deteriorated product.
- the treatment can be performed with the same heat source, and the equipment cost can be reduced.
- the stored absorption liquid 1003 is sampled and the amount of the absorption liquid component in the absorption liquid 1003 is measured, and the measured amount of the absorption liquid component reaches a predetermined amount or less. And ending the reclaiming.
- this reclaiming method it is possible to always maintain the absorbing function of the absorbing liquid 1003 in a stable state by finishing the reclaiming based on the amount of the absorbing liquid component in the stored absorbing liquid 1003.
- the step of heating the stored absorbent 1003 causes the absorbent 1003 and steam to exchange heat in a non-contact manner, and the vapor pressure of the steam is set to a predetermined pressure (for example, 2 to 2). 3 [kg / cm 2 G]).
- the pressure rise in the heating unit can be suppressed. Therefore, if the vapor pressure of the vapor for heating the stored absorbent 1003 is kept at a predetermined pressure, the heating source Since the vapor pressure can be kept constant, it is possible to reduce the amount of the absorbing liquid component that deteriorates due to heating, and to realize a reduction in the size of the reclaiming device.
- the reclaiming device according to the second embodiment is applied to a recovery device having the same main configuration as that of the first embodiment described above, and a part of the configuration is different from the reclaiming device according to the first embodiment. Therefore, in the second embodiment described below, the description on the recovery device is omitted, and the same reference numerals are assigned to the same components as those in the first embodiment with respect to the reclaiming device, and the description thereof is omitted.
- the reclaiming device 106 includes an absorbing liquid component extraction portion 106j, a nozzle 106k, an absorbing liquid extraction pipe 106m, an on-off valve V6, an extraction pump 106n, a packed bed 106p, and an absorbing liquid discharge.
- a pipe 106v, an on-off valve V7, a steam introduction pipe 106w, and an on-off valve V8 are provided.
- the absorbing liquid component extraction portion 106j is a sealed container provided separately from the sealed container 106a.
- An absorption liquid discharge pipe 106v is connected to the top of the absorption liquid component extraction part 106j.
- the absorption liquid discharge pipe 106v is connected to the lower part of the regeneration tower 104 by being connected to the above-described absorption liquid discharge pipe 106f.
- the absorption liquid discharge pipe 106v is provided with an on-off valve V7.
- the nozzle 106k is provided in the upper part in the absorbing liquid component extraction portion 106j.
- the nozzle 106k is connected to the bottom of the hermetic container 106a via an absorbing liquid extraction pipe 106m.
- the absorbing liquid extraction pipe 106m is provided with an on-off valve V6 and an extraction pump 106n.
- the packed layer 106p is provided below the nozzle 106k in the absorbing liquid component extraction portion 106j.
- the steam introduction pipe 106w is connected to the lower part in the absorption liquid component extraction part 106j, and introduces saturated vapor 1004c into the absorption liquid component extraction part 106j.
- the steam introduction pipe 106w is provided with an on-off valve V8.
- This reclaiming device 106 opens the on-off valve V6 and operates the extraction pump 106n, whereby a part of the deteriorated lean solution 1003a is discharged from the sealed container 106a through the absorbing liquid extraction pipe 106m to the nozzle 106k. And is sprayed and flows down from the nozzle 106k into the absorption liquid component extraction portion 106j. That is, a part of the CO 2 absorbent 1003 stored in the sealed container 106a, which is an absorbent storage part, is extracted by the absorbent discharge pipe 106m, the on-off valve V6, the extraction pump 106n, and the nozzle 106k, and the absorbent component is extracted.
- the absorbent liquid circulation part 11 to be circulated through the part 106j is configured.
- the on-off valve V8 is opened, and the saturated steam 1004c is introduced to the lower side in the absorbing liquid component extraction part 106j through the steam introduction pipe 106w.
- the saturated vapor 1004c rises in the absorbing liquid component extraction unit 106j.
- the rising saturated vapor 1004c makes countercurrent contact with the lean solution 1003a flowing down from the nozzle 106k at the position of the packed bed 106p. That is, the steam supply pipe 21w and the on-off valve V8 constitute a steam supply section 21 that supplies steam in the absorption liquid component extraction section 106j so as to face the flow direction of the absorption liquid 1003 by the absorption liquid circulation section 11. Yes.
- the lean solution 1003a flowing down from the nozzle 106k comes into countercurrent contact with the saturated vapor 1004c rising in the absorption liquid component extraction portion 106j, whereby the absorption liquid component volatilizes. That is, as shown in FIG. 7A, the rising vapor reaches from the lower region to the upper region and comes into countercurrent contact with the absorption liquid 1003 (lean solution 1003a), so that the absorption liquid component contained in the gas phase (Amine) is volatilized and extracted from the absorbing solution 1003 (lean solution 1003a).
- the absorption liquid component contained in the gas phase (Amine) is volatilized and extracted from the absorbing solution 1003 (lean solution 1003a).
- the absorption liquid 1003 flowing down (lean solution 1003a) reaches from the upper area to the lower area and comes into countercurrent contact with the saturated vapor 1004c, so that the absorption contained in the liquid phase.
- the liquid component (amine) volatilizes and separates from the deteriorated product.
- the volatilized absorption liquid component is separated from the deteriorated material, passes through the open on-off valve V7, and is returned to the regeneration tower 104 through the absorption liquid discharge pipe 106v.
- the packed bed 106p is suitable for bringing the lean solution 1003a flowing down from the nozzle 106k and the rising saturated vapor 1004c into gas-liquid contact, volatilizing the absorbed liquid component and separating it from the deteriorated product.
- the packed layer 106p includes a packed layer structure filled with a filler such as a ball ring or a cascade ring.
- the packed bed 106p is more preferably provided, but even if it is not provided, the lean solution 1003a flowing down from the nozzle 106k and the rising saturated vapor 1004c come into countercurrent contact with each other, so that the absorption liquid component is removed from the deteriorated material. It is possible to separate them.
- the reclaiming apparatus 106 includes a recovery unit 106q that recovers (samples) a part of the absorbent 1003 (lean solution 1003a) stored in the sealed container 106a.
- the recovery unit 106q is connected to the subsequent stage of the extraction pump 106n in the absorbing liquid extraction pipe 106m.
- the recovery unit 106q is provided with a measurement unit 106r that measures the amount of the absorption liquid component in the recovered absorption liquid 1003 (lean solution 1003a).
- the measurement information measured by the measurement unit 106r is output to the control unit 106s. Note that the sampling of the absorbing liquid 1003 (lean solution 1003a) is not limited to the absorbing liquid extraction pipe 106m, and may be collected from the sealed container 106a.
- the control unit 106s is composed of a microcomputer or the like. As shown in FIG. 8, the control unit 106s is provided with a storage unit 106t.
- the storage unit 106t includes a RAM, a ROM, and the like, and stores programs and data.
- data of the amount of the absorption liquid component in the absorption liquid 1003 (lean solution 1003a) stored in the sealed container 106a is stored in order to operate the reclaiming device. In this data, for example, the absorption liquid component amount in the absorption liquid 1003 (lean solution 1003a) is set to 5 [wt%].
- This setting is an index indicating how much the absorption liquid component has decreased from the absorption liquid 1003 (lean solution 1003a) stored in the sealed container 106a, and can be arbitrarily set.
- the measuring unit 106r, the on-off valves V1 to V8, and the pumps 106e and 106n are connected to the control unit 106s.
- the control unit 106s comprehensively controls the on-off valves V1 to V8 and the pumps 106e and 106n according to the program and data stored in advance in the storage unit 106t based on the concentration information input from the measurement unit 106r.
- the control unit 106s opens the on-off valves V1, V2, V4 to V8 and operates the extraction pump 106n based on the reclaiming start command (step S11).
- a part of the absorption liquid 1003 (lean solution 1003a) reaches the sealed container 106a from the regeneration tower 104, is heated together with the dilution water 1007, evaporates, and returns to the regeneration tower 104 through the absorption liquid discharge pipe 106f.
- the absorbing liquid 1003 (lean solution 1003a) stored in the sealed container 106a volatilizes in countercurrent contact with the saturated vapor 1004c that rises in the absorbing liquid component extraction portion 106j while flowing down from the nozzle 106k, and is evaporated. 106v is returned to the regeneration tower 104. As a result, it is possible to separate the absorption liquid component from the deteriorated material and take it out. Then, based on the measurement information input from the measurement unit 106r, the control unit 106s has an absorption liquid component amount in the absorption liquid 1003 (lean solution 1003a) of the sealed container 106a equal to or less than a predetermined amount (for example, 5 [wt%]).
- a predetermined amount for example, 5 [wt%]
- Step S12 Yes
- the on-off valves V1, V2, V4 to V8 are closed and the extraction pump 106n is stopped to complete the reclaiming (step S13).
- the on / off valve V3 is opened and the sludge discharge pump 106e is operated to discharge the sludge 1006 to the outside of the sealed container 106a.
- the sealed container 106a which is an absorbent storing part that stores a part of the absorbent 1003 that has absorbed CO 2 in the exhaust gas 1001, and the sealed container 106a are stored. And a heating unit that heats the absorbed liquid 1003. A part of the absorbed liquid 1003 stored in the sealed container 106a is circulated, and vapor (gas) is brought into countercurrent contact with the circulated absorbent liquid 1003.
- the absorbing liquid component volatilizes and is separated from the deteriorated substance.
- the components can be taken out, and the loss of the absorbing liquid 1003 can be reduced.
- the absorption liquid 1003 starts to be heated from about 120 [° C.], and the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product.
- the steam pressure passed through the steam pipe 106g which is a heating unit, must be increased, and higher pressure steam is required at the heating source.
- the alkanolamine, which is the absorbent component of the absorbent 1003 may be deteriorated by the heat accompanying the increase in the heating temperature.
- the absorption liquid component stored in the sealed container 106a is brought into countercurrent contact with the vapor to separate the absorption liquid component from the deteriorated material. Since the product is concentrated, the heating temperature for concentrating the deteriorated product is suppressed, and the pressure rise in the heating unit is suppressed, so that the steam pressure of the heating source can be suppressed. Moreover, since the heating temperature can be suppressed, it is possible to reduce the amount of the absorbent component that deteriorates due to heating. Furthermore, since the deteriorated product can be concentrated while suppressing the heating temperature in the heating unit, the efficiency of the operation of concentrating the deteriorated product is improved, so that the reclaiming device 106 itself can be downsized.
- an absorbing solution circulation unit 11 that extracts and distributes a part of the absorbing solution 1003 stored in the sealed container 106a, and a vapor supply unit that supplies vapor generated outside the reclaiming device. 21 and an absorption liquid component extraction unit 106j that makes the absorption liquid 1003 extracted by the absorption liquid circulation unit 11 counter-currently contact with the vapor of the vapor supply unit 21.
- saturated vapor 1004c generated outside the reclaiming device 106 that is, a vapor that does not contain an amine as an absorbing liquid component, is used to absorb the deteriorated product.
- the efficiency of separating liquid components can be improved.
- the reclaiming device 106 further includes a packed bed 106p that brings the absorbent 1003 circulated by the absorbent circulator 1 into vapor-liquid contact.
- the reclaiming device 106 it is possible to promote the separation of the absorbent component from the deteriorated product contained in the absorbent 1003.
- circulation part 11 extracts the absorption pump 106n which extracts a part of absorption liquid 1003 from the airtight container 106a, and raises the absorption lifted by the extraction pump 106n. And a nozzle 106k that causes the liquid 1003 to flow down against the rising vapor.
- the reclaiming device 106 it is possible to appropriately make countercurrent contact between the absorbing liquid 1003 stored in the sealed container 106a and the steam.
- the measuring unit 106r that measures the amount of the absorbing liquid component in the absorbing liquid 1003 stored in the sealed container 106a, and the amount of the absorbing liquid component obtained from the measuring unit 106r is equal to or less than a predetermined amount.
- the control unit 106s is further provided to terminate the reclaiming.
- the reclaiming is terminated based on the amount of the absorbing liquid component in the absorbing liquid 1003 stored in the sealed container 106a, so that the absorption function of the absorbing liquid 1003 can be always maintained in a stable state. Is possible.
- the opening / closing valves V1, V2, V4 to V8 are opened and the extraction pump 106n is operated at the start of reclaiming. For this reason, the heat evaporation of the absorbent 1003 (lean solution 1003a) and the volatilization of the absorbent component can be performed simultaneously, so that the efficiency of the reclaiming operation can be improved.
- the on-off valves V1, V2, V4, and V5 are opened to heat and evaporate the absorbent 1003 (lean solution 1003a), and then the on-off valves V6 to V8 are opened.
- the extraction pump 106n may be operated to volatilize the absorption liquid component.
- the absorption liquid 1003 (lean solution 1003a) is heated, the absorption liquid 1003 containing the absorption liquid component of 30 [wt%] absorbs 5 [wt%] after the heat evaporation.
- the heat-stable salt content is concentrated in the absorption liquid 1003 containing the liquid component, and this concentrated absorption liquid 1003 is brought into countercurrent contact with the vapor. It becomes possible to improve the separation efficiency of the absorbent component.
- the reclaiming method according to Embodiment 2 includes a step of storing a part of the absorbent 1003 that has absorbed CO 2 in the exhaust gas 1001 and a step of heating the stored absorbent 1003. It includes a step of making countercurrent contact with the vapor (gas) while circulating a part of the liquid 1003.
- the vapor is counter-contacted with a part of the stored absorbent 1003, so that the absorbent component is volatilized and separated from the deteriorated product. It is possible to reduce the loss of the absorbent 1003.
- the absorbent 1003 starts to be heated from about 120 [° C.], and the heating temperature is increased to, for example, 150 [° C.] according to the concentration frequency of the deteriorated product. For this reason, the steam pressure passed through the steam pipe 106g, which is a heating unit, must be increased, and higher pressure steam is required at the heating source. Further, the alkanolamine, which is the absorbent component of the absorbent 1003, may be deteriorated by the heat accompanying the increase in the heating temperature.
- the stored absorbent liquid 1003 and the vapor are brought into countercurrent contact to separate the absorbent component from the deteriorated product, so that the deteriorated product is concentrated. Therefore, the heating temperature for concentrating the deteriorated product can be suppressed, and the pressure increase in the heating unit can be suppressed, so that the steam pressure of the heating source can be suppressed. Moreover, since the heating temperature can be suppressed, it is possible to reduce the amount of the absorbent component that deteriorates due to heating. Furthermore, since the deteriorated product can be concentrated while suppressing the heating temperature in the heating unit, the efficiency of the work of concentrating the deteriorated product is improved, and the reclaiming device can be downsized.
- a part of the stored absorbent 1003 is extracted and circulated, and a saturated vapor 1004c generated outside is brought into countercurrent contact with the extracted absorbent 1003. including.
- the saturated vapor 1004c generated outside the reclaiming device 106 that is, the vapor containing no amine as the absorbent component, is used to absorb the absorbent from the deteriorated product.
- the efficiency of separating components can be improved.
- the stored absorption liquid 1003 is sampled and the amount of the absorption liquid component in the absorption liquid 1003 is measured, and the measured amount of the absorption liquid component reaches a predetermined amount or less. And ending the reclaiming.
- this reclaiming method it is possible to always maintain the absorbing function of the absorbing liquid 1003 in a stable state by finishing the reclaiming based on the amount of the absorbing liquid component in the stored absorbing liquid 1003.
- the step of heating the stored absorbent 1003 causes the absorbent 1003 and steam to exchange heat in a non-contact manner, and the vapor pressure of the steam is set to a predetermined pressure (for example, 2 to 2). 3 [kg / cm 2 G]).
- the pressure rise in the heating unit can be suppressed. Therefore, if the vapor pressure of the vapor for heating the stored absorbent 1003 is kept at a predetermined pressure, the heating source Since the vapor pressure can be kept constant, it is possible to reduce the amount of the absorbing liquid component that deteriorates due to heating, and to realize a reduction in the size of the reclaiming device.
- the reclaiming device of the third embodiment is applied to a recovery device having the same main configuration as that of the first embodiment described above, and is different in that the reclaiming device of the first embodiment further includes a dry steam supply unit. Therefore, in the third embodiment described below, the description regarding the recovery device is omitted, and the same reference numerals are assigned to the same components as those in the first embodiment regarding the reclaiming device, and the description thereof is omitted.
- FIG. 10 is a schematic diagram of a reclaiming device according to Embodiment 3 of the present invention.
- the reclaiming device 106 includes a dry steam supply unit 3.
- the dry steam supply unit 3 includes a dry steam introduction pipe 3a and an on-off valve V9.
- the dry steam introduction pipe 3a is connected to the upper part of the sealed container 106a, and introduces the dry steam 1008 into the sealed container 106a.
- the dry steam introduction pipe 3a is connected to a steam turbine provided in a power generation facility such as a thermal power plant in which combustion exhaust gas (exhaust gas) is recovered by the recovery device described above.
- the dry steam 1008 introduced into the sealed container 106a by the dry steam introduction pipe 3a is extracted from the steam turbine.
- the dry steam 1008 is a low-pressure steam of about 1 [kg / cm 2 G] at 200 [° C.] to 250 [° C.].
- the on-off valve V9 is provided in the dry steam introduction pipe 3a, and introduces or stops the introduction of the dry steam 1008 by opening and closing.
- This reclaiming device 106 opens the on-off valve V6 and operates the extraction pump 106n, whereby a part of the deteriorated lean solution 1003a is discharged from the sealed container 106a through the absorbing liquid extraction pipe 106m to the nozzle 106k. And is sprayed and flows down from the nozzle 106k into the absorption liquid component extraction portion 106j. That is, the absorption liquid component is extracted while extracting a part of the CO 2 absorption liquid 1003 stored in the sealed container 106a as the absorption liquid storage section by the absorption liquid extraction pipe 106m, the on-off valve V6, the extraction pump 106n, and the nozzle 106k.
- the absorbing liquid circulation part 1 is configured that constitutes a circulation mechanism that returns to the sealed container 106a through the extraction part 106j.
- the on-off valve V5 is opened and the lean solution 1003a is heated through the saturated steam 1004b through the steam pipe 106g. Then, the lean solution 1003a stored in the sealed container 106a rises as a vapor and reaches the absorption liquid component extraction unit 106j. Then, the rising vapor of the lean solution 1003a makes countercurrent contact with the lean solution 1003a flowing down from the nozzle 106k at the position of the packed bed 106p. At this time, by opening the on-off valve V9 of the dry steam supply unit 3, the dry steam 1008 is introduced into the sealed container 106a via the dry steam introduction pipe 3a.
- the dry steam 1008 moves up the absorbing liquid component extraction portion 106j and makes countercurrent contact with the lean solution 1003a flowing down from the nozzle 106k at the position of the packed bed 106p.
- the dry steam 1008 is at a higher temperature than the temperature at which the lean solution (absorbing liquid) 1003a stored in the sealed container 106a is heated.
- the lean solution 1003a flowing down from the nozzle 106k comes into countercurrent contact with the vapor of the lean solution 1003a rising from the sealed container 106a, so that the absorption liquid component volatilizes.
- the lean solution 1003a flowing down from the nozzle 106k comes into countercurrent contact with the dry steam 1008 rising from the sealed container 106a, so that the absorbent component further volatilizes. That is, as shown in FIG. 3 (a), the rising vapor and the dry vapor 1008 reach the upper region from the lower region and are contained in the gas phase by making countercurrent contact with the absorbing solution 1003 (lean solution 1003a).
- the absorbed liquid component (amine) is volatilized and extracted from the absorbent 1003 (lean solution 1003a).
- the flowing down absorption liquid 1003 (lean solution 1003a) reaches from the upper region to the lower region, and is contained in the liquid phase by making countercurrent contact with the vapor and the dry vapor 1008.
- the absorbed liquid component (amine) is volatilized and separated from the deteriorated product.
- the volatilized absorption liquid component is separated from the deteriorated material, passes through the open on-off valve V4, and returns to the regeneration tower 104 through the absorption liquid discharge pipe 106f.
- the reclaiming device 106 according to the third embodiment described above generates dry steam (gas) 1008 that is higher in temperature than the temperature at which the absorbing liquid 1003 (lean solution 1003a) is heated.
- a dry steam supply unit 3 that supplies the sealed container 106a, which is an absorbent storage unit, is provided.
- the high-temperature dry steam 1008 is brought into countercurrent contact with a part of the absorption liquid 1003 stored in the sealed container 106a. Since it is separated, the absorption liquid component can be further extracted from the deteriorated material, and the loss of the absorption liquid 1003 can be reduced.
- the lean solution 1003a is 150 times.
- the absorbent component of the lean solution 1003a flowing down from the nozzle 106k cannot be sufficiently volatilized because it can only be heated to about [° C.].
- the absorbent component is further volatilized. Is possible.
- dry vapor (gas) 1008 having a temperature higher than the temperature at which the absorbent 1003 is circulated is partially recycled to the absorbent 1003. A counter-current contact.
- the dry steam 1008 is brought into countercurrent contact with a part of the absorbing liquid 1003 stored in the sealed container 106a, and therefore, the absorbing liquid component is further volatilized, so that it is reliably separated from the deteriorated product. Further, it is possible to extract the absorbent component from the deteriorated product, and to reduce the loss of the absorbent 1003.
- the lean solution 1003a by the heating unit is used.
- the heating of (absorbing liquid 1003) may be stopped.
- the lean solution 1003a (absorbing liquid 1003) is heated in advance by the heating unit, and then the drying solution supplied to the lean solution 1003a (absorbing liquid 1003) flowing down from the nozzle 106k is supplied by the dry steam supplying unit 3.
- heating of the lean solution 1003a (absorbing liquid 1003) by the heating unit may be stopped.
- the reclaiming device of the fourth embodiment is applied to a recovery device having the same main configuration as that of the above-described first embodiment, and differs in that a gas supply unit is provided instead of the steam supply unit 21 of the reclaiming device of the second embodiment. . Therefore, in the fourth embodiment described below, the description regarding the recovery device is omitted, and the same reference numerals are given to the same components as those of the second embodiment regarding the reclaiming device, and the description thereof is omitted.
- FIG. 11 is a schematic diagram of a reclaiming device according to Embodiment 4 of the present invention.
- the reclaiming device 106 includes a gas supply unit 4.
- the gas supply unit 4 includes a gas introduction pipe 4a and an on-off valve V10.
- the gas introduction pipe 4a is connected to the lower part in the absorption liquid component extraction part 106j forming a sealed container, and introduces the exhaust gas 1001a into the absorption liquid component extraction part 106j.
- the gas introduction pipe 4a is connected downstream of the exhaust gas blower 102a that sends the exhaust gas 1001 to the cooling tower 102 in the above-described recovery apparatus.
- the exhaust gas 1001a introduced into the absorbing liquid component extraction portion 106j by the gas introduction pipe 4a is CO 2 or H 2 S, and is a high-temperature exhaust gas 1001 at 120 ° C. to 130 ° C.
- the on-off valve V10 is provided in the gas introduction pipe 4a and introduces or stops introduction of the exhaust gas 1001a by opening and closing thereof.
- a gas discharge pipe 106x is connected to the top of the absorbing liquid component extraction part 106j.
- the gas exhaust pipe 106x is connected to an exhaust gas pipe 102e that supplies the absorption tower 103 with the exhaust gas 1001 cooled by the cooling tower 102 in the above-described recovery apparatus.
- the gas discharge pipe 106x is provided with an on-off valve V11.
- This reclaiming device 106 opens the on-off valve V6 and operates the extraction pump 106n, whereby a part of the deteriorated lean solution 1003a is discharged from the sealed container 106a through the absorbing liquid extraction pipe 106m to the nozzle 106k. And is sprayed and flows down from the nozzle 106k into the absorption liquid component extraction portion 106j. That is, a part of the CO 2 absorbent 1003 stored in the sealed container 106a, which is an absorbent storage part, is extracted by the absorbent discharge pipe 106m, the on-off valve V6, the extraction pump 106n, and the nozzle 106k, and the absorbent component is extracted.
- the absorbent liquid circulation part 11 to be circulated through the part 106j is configured.
- the on-off valve V10 is opened, and the exhaust gas 1001a is introduced to the lower side in the absorbing liquid component extraction portion 106j through the gas introduction pipe 4a.
- the exhaust gas 1001a rises in the absorption liquid component extraction unit 106j.
- the raised exhaust gas 1001a makes countercurrent contact with the lean solution 1003a flowing down from the nozzle 106k at the position of the packed bed 106p.
- the lean solution 1003a flowing down from the nozzle 106k comes into countercurrent contact with the exhaust gas 1001a rising in the absorption component extraction section 106j, whereby the absorption component volatilizes. That is, when the steam in FIG. 7A is replaced with exhaust gas, the rising exhaust gas 1001a reaches from the lower region to the upper region, and is contained in the gas phase by making countercurrent contact with the absorbing solution 1003 (lean solution 1003a). The absorbed liquid component (amine) is volatilized and extracted from the absorbent 1003 (lean solution 1003a). On the other hand, as shown in FIG.
- the absorption liquid 1003 flowing down (lean solution 1003a) reaches from the upper area to the lower area and comes into countercurrent contact with the saturated vapor 1004c, so that the absorption contained in the liquid phase.
- the liquid component (amine) volatilizes and separates from the deteriorated product.
- the volatilized absorption liquid component is separated from the deteriorated material, passes through the open on-off valve V11, and is sent to the absorption tower 103 through the gas exhaust pipe 106x.
- the reclaiming device 106 As described above, the reclaiming device 106 according to Embodiment 4 described above is stored in the sealed container 106a, which is an absorbent storage section that stores a part of the absorbent 1003 that has absorbed CO 2 in the exhaust gas 1001, and the sealed container 106a. And a heating unit that heats the absorbed liquid 1003, a part of the absorbent 1003 stored in the sealed container 106 a is circulated, and the circulated absorbent 1003 absorbs CO 2 or H 2 S. (Gas) 1001a is brought into countercurrent contact.
- the sealed container 106a which is an absorbent storage section that stores a part of the absorbent 1003 that has absorbed CO 2 in the exhaust gas 1001, and the sealed container 106a.
- a heating unit that heats the absorbed liquid 1003, a part of the absorbent 1003 stored in the sealed container 106 a is circulated, and the circulated absorbent 1003 absorbs CO 2 or H 2 S. (Gas) 1001a is brought into
- the absorption liquid component is volatilized and separated from the deteriorated product.
- the absorption liquid component can be taken out from the deteriorated product, and the loss of the absorption liquid 1003 can be reduced.
- the reclaiming device 106 includes an absorption liquid circulation unit 11 that extracts and distributes a part of the absorption liquid 1003 stored in the sealed container 106a, and an exhaust gas 1001a in which CO 2 or H 2 S is absorbed.
- circulation part 11 counter-flow-contact with the waste gas (gas) 1001a of the gas supply part 4 are provided.
- deterioration occurs by using the exhaust gas 1001a that is generated outside the reclaiming device 106 and absorbs CO 2 or H 2 S. It is possible to separate the absorbent component from the product.
- the reclaiming method of the fourth embodiment includes a step of storing a part of the absorbing liquid 1003 that has absorbed CO 2 in the exhaust gas 1001, and a step of heating the stored absorbing liquid 1003. And a counter-flow contact with exhaust gas (gas) 1001a in which CO 2 or H 2 S is absorbed while flowing a part of the absorbed liquid 1003.
- the absorbent component is volatilized and separated from the deteriorated product.
- the components can be taken out, and the loss of the absorbing liquid 1003 can be reduced.
- a part of the stored absorption liquid 1003 is extracted and distributed, and the exhaust gas 1001a in which CO 2 or H 2 S is absorbed is extracted into the extracted absorption liquid 1003. And countercurrent contact.
- the use of the exhaust gas 1001a that is generated outside the reclaiming device 106 and absorbs CO 2 or H 2 S can be used as a deteriorated product. It is possible to separate the absorbent component from
- the gas introduction pipe 4a is not shown in the drawing, but is connected to a portion where the exhaust gas 1001 of the absorption tower 103 is discharged in the above-described recovery apparatus, and is discharged from the absorption tower 103.
- the exhaust gas 1001a from which 2 or H 2 S has been removed may be provided so as to be introduced into the absorbent component extraction portion 106j.
- Embodiments 1 to 4 described above the description has been given of the recovery device that recovers CO 2 (carbon dioxide) contained in combustion exhaust gas (exhaust gas), but as described above, coal gasification gas, Synthesis gas, coke oven gas, petroleum gas, natural gas, etc. also contain H 2 S (hydrogen sulfide). And even when this H 2 S (hydrogen sulfide) is absorbed by the absorbing solution, the above-described reclaiming apparatus and reclaiming method can be applied.
- the absorbing liquid flowing down and the rising vapor come in countercurrent contact.
- the form in which countercurrent contact is made is not limited to the vertical direction, but the horizontal direction. Or an oblique direction.
- the steam does not have to be in the true direction with respect to the flowing direction of the absorbing liquid by contacting the vapor in the opposite direction to the flowing direction of the absorbing liquid.
- the conventional example does not apply the above-described reclaiming device, and the absorbent component contained in the sludge discharged by reclaiming was 7.3 [wt%].
- the recovery device reclaiming was performed several times in one year, and the amount of discharged sludge in one reclaiming was 19 [Ton] / 1 time.
- the number of annual reclaiming was 3.8 times / year.
- the annual loss amount of the absorption liquid due to the absorption liquid component contained in the sludge is 5,993 [kg] / year, and the ratio of the loss amount of the absorption liquid component contained in the sludge to the entire absorption liquid is 14. It was 8 [%].
- the above-described reclaiming apparatus was applied, and the absorption liquid component contained in the sludge was 1.0 [%]. Moreover, the annual loss amount of the absorption liquid by the absorption liquid component contained in the sludge was 820 [kg] / year. As a result, the annual loss reduction amount of the absorbent was 5,173 [kg] / year, and the annual absorbent reduction ratio was 12.7 [%].
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Abstract
Description
石炭ガス化ガス、合成ガス、コークス炉ガス、石油ガス、天然ガスなどには、CO2(二酸化炭素)やH2S(硫化水素)が含まれる。このような、CO2(二酸化炭素)やH2S(硫化水素)を回収する回収装置や、燃焼排ガス(以下、排ガスという)からCO2(二酸化炭素)を回収する回収装置としては、図1に示すように、例えば、ボイラなどの産業設備101から排出される排ガス1001を、冷却水1002により冷却する冷却塔102と、排ガス1001に、CO2を吸収するアルカノールアミン水溶液などのアミン系吸収液である吸収液1003(リーン溶液1003a)を向流接触させて排ガス1001中のCO2を吸収液1003に吸収させ、CO2を除去した排ガス1001を排出する吸収塔103と、CO2を吸収した吸収液1003(リッチ溶液1003b)を再生する再生塔104とを備えている。 [Embodiment 1]
Coal gasification gas, synthesis gas, coke oven gas, petroleum gas, natural gas and the like include CO 2 (carbon dioxide) and H 2 S (hydrogen sulfide). Such a recovery device that recovers CO 2 (carbon dioxide) and H 2 S (hydrogen sulfide) and a recovery device that recovers CO 2 (carbon dioxide) from combustion exhaust gas (hereinafter referred to as exhaust gas) are shown in FIG. 2, for example, a
実施の形態2のリクレーミング装置は、上述した実施の形態1と主構成が同じ回収装置に適用され、実施の形態1のリクレーミング装置と一部の構成が異なる。従って、以下に説明する実施の形態2では、回収装置に関する説明を省略し、リクレーミング装置に関して実施の形態1と同等の構成に同一の符号を付してその説明を省略する。 [Embodiment 2]
The reclaiming device according to the second embodiment is applied to a recovery device having the same main configuration as that of the first embodiment described above, and a part of the configuration is different from the reclaiming device according to the first embodiment. Therefore, in the second embodiment described below, the description on the recovery device is omitted, and the same reference numerals are assigned to the same components as those in the first embodiment with respect to the reclaiming device, and the description thereof is omitted.
実施の形態3のリクレーミング装置は、上述した実施の形態1と主構成が同じ回収装置に適用され、実施の形態1のリクレーミング装置に乾燥蒸気供給部をさらに備える点で異なる。従って、以下に説明する実施の形態3では、回収装置に関する説明を省略し、リクレーミング装置に関して実施の形態1と同等の構成に同一の符号を付してその説明を省略する。 [Embodiment 3]
The reclaiming device of the third embodiment is applied to a recovery device having the same main configuration as that of the first embodiment described above, and is different in that the reclaiming device of the first embodiment further includes a dry steam supply unit. Therefore, in the third embodiment described below, the description regarding the recovery device is omitted, and the same reference numerals are assigned to the same components as those in the first embodiment regarding the reclaiming device, and the description thereof is omitted.
実施の形態4のリクレーミング装置は、上述した実施の形態1と主構成が同じ回収装置に適用され、実施の形態2のリクレーミング装置の蒸気供給部21に替えて、ガス供給部を備える点で異なる。従って、以下に説明する実施の形態4では、回収装置に関する説明を省略し、リクレーミング装置に関して実施の形態2と同等の構成に同一の符号を付してその説明を省略する。 [Embodiment 4]
The reclaiming device of the fourth embodiment is applied to a recovery device having the same main configuration as that of the above-described first embodiment, and differs in that a gas supply unit is provided instead of the
2,21 蒸気供給部
3 乾燥蒸気供給部
3a 乾燥蒸気導入管
4 ガス供給部
4a ガス導入管
101 産業設備
102 冷却塔
102a 排ガス送風機
102b 加湿冷却水循環ポンプ
102c 冷却水管
102d 冷却器
102e 排ガス管
103 吸収塔
103a 吸収液供給ポンプ
103b リーン溶液管
103c 冷却器
104 再生塔
104a 吸収液排出ポンプ
104b リッチ溶液管
104c 再生加熱器
104d 環流水ポンプ
104e 環流管
104f 再生塔環流冷却器
104g CO2分離器
104h 回収CO2排出管
105 リッチ・リーン熱交換器
106 リクレーミング装置
106a 密閉容器
106b 抜出管
106c 水供給管
106d スラッジ排出管
106e スラッジ排出ポンプ
106f 吸収液排出管
106g 蒸気管
106h 蒸気供給管
106i 蒸気排出管
106j 吸収液成分取出部
106k ノズル
106m 吸収液抜出管
106n 抜出ポンプ
106p 充填層
106q 回収部
106r 測定部
106s 制御部
106t 記憶部
106v 吸収液排出管
106w 蒸気導入管
106x ガス排出管
1001,1001a 排ガス
1002 冷却水
1003 吸収液
1003a リーン溶液
1003b リッチ溶液
1004a,1004b,1004c 飽和蒸気
1005 環流水
1006 スラッジ
1007 希釈水
1008 乾燥蒸気
V1,V2,V3,V4,V5,V6,V7,V8,V9,V10,V11 開閉弁 DESCRIPTION OF SYMBOLS 1,11 Absorption liquid distribution part 2,21 Steam supply part 3 Dry steam supply part 3a Dry steam supply pipe 4 Gas supply part 4a Gas introduction pipe 101 Industrial equipment 102 Cooling tower 102a Exhaust gas blower 102b Humidity cooling water circulation pump 102c Cooling water pipe 102d Cooling 102e Exhaust gas pipe 103 Absorption tower 103a Absorption liquid supply pump 103b Lean solution pipe 103c Cooler 104 Regeneration tower 104a Absorption liquid discharge pump 104b Rich solution pipe 104c Regenerative heater 104d Recirculation water pump 104e Recirculation pipe 104f Regeneration tower recirculation cooler 104g CO 2 separator 104h recovered CO 2 discharge line 105 rich lean heat exchanger 106 reclaiming apparatus 106a closed container 106b discharge pipe 106c water supply pipe 106d sludge discharge pipe 106e sludge discharge pump 106f intake Liquid discharge pipe 106g Steam pipe 106h Steam supply pipe 106i Steam discharge pipe 106j Absorbing liquid component extraction section 106k Nozzle 106m Absorption liquid extraction pipe 106n Extraction pump 106p Packing layer 106q Recovery section 106r Measurement section 106s Control section 106t Storage section 106v Absorption liquid Discharge pipe 106w Steam introduction pipe 106x Gas discharge pipe 1001, 1001a Exhaust gas 1002 Cooling water 1003 Absorbent liquid 1003a Lean solution 1003b Rich solution 1004a, 1004b, 1004c Saturated steam 1005 Recirculating water 1006 Sludge 1007 Diluted water 1008 Dry steam V1, V2, V3 V4, V5, V6, V7, V8, V9, V10, V11 On-off valve
Claims (15)
- ガス中のCO2またはH2Sを吸収した吸収液の一部を貯留する吸収液貯留部と、前記吸収液貯留部に貯留された前記吸収液を加熱する加熱部とを有するリクレーミング装置において、
前記吸収液貯留部に貯留された前記吸収液の一部を流通させ、流通する前記吸収液に気体を向流接触させることを特徴とするリクレーミング装置。 In a reclaiming apparatus having an absorption liquid storage section that stores a part of an absorption liquid that has absorbed CO 2 or H 2 S in gas, and a heating section that heats the absorption liquid stored in the absorption liquid storage section.
A reclaiming apparatus characterized in that a part of the absorption liquid stored in the absorption liquid storage part is circulated, and gas is brought into countercurrent contact with the circulated absorption liquid. - 前記吸収液貯留部に貯留された前記吸収液の一部を抜き出し前記吸収液貯留部に戻して流通させる循環機構をなす吸収液流通部と、
前記加熱部により加熱された前記吸収液から蒸気を生じさせる蒸気供給部と、
前記吸収液貯留部に設けられ前記吸収液貯留部に戻される前記吸収液を前記蒸気供給部の蒸気と向流接触させる吸収液成分取出部と、
を備えることを特徴とする請求項1に記載のリクレーミング装置。 An absorption liquid circulation part that forms a circulation mechanism for extracting a part of the absorption liquid stored in the absorption liquid storage part and returning it to the absorption liquid storage part;
A steam supply section for generating steam from the absorbing liquid heated by the heating section;
An absorption liquid component take-out section that is provided in the absorption liquid storage section and makes the absorption liquid returned to the absorption liquid storage section counter-contact with the vapor of the vapor supply section;
The reclaiming device according to claim 1, further comprising: - 前記吸収液を加熱する温度よりも高温の乾燥蒸気を前記吸収液貯留部に供給する乾燥蒸気供給部を備えることを特徴とする請求項2に記載のリクレーミング装置。 The reclaiming apparatus according to claim 2, further comprising a dry vapor supply unit that supplies dry vapor having a temperature higher than a temperature at which the absorption liquid is heated to the absorption liquid storage unit.
- 前記吸収液貯留部に貯留された前記吸収液の一部を抜き出して流通させる吸収液流通部と、
リクレーミング装置の外部で発生した蒸気を供給する蒸気供給部と、
前記吸収液流通部で抜き出される前記吸収液を前記蒸気供給部の蒸気と向流接触させる吸収液成分取出部と、
を備えることを特徴とする請求項1に記載のリクレーミング装置。 An absorption liquid circulation part that extracts and distributes a part of the absorption liquid stored in the absorption liquid storage part; and
A steam supply section for supplying steam generated outside the reclaiming device;
An absorption liquid component extraction part that makes the absorption liquid drawn out in the absorption liquid circulation part counter-contact with the vapor of the vapor supply part;
The reclaiming device according to claim 1, further comprising: - 前記吸収液貯留部に貯留された前記吸収液の一部を抜き出して流通させる吸収液流通部と、
CO2またはH2Sが吸収される前記ガスを供給するガス供給部と、
前記吸収液流通部で抜き出される前記吸収液を前記ガス供給部のガスと向流接触させる吸収液成分取出部と、
を備えることを特徴とする請求項1に記載のリクレーミング装置。 An absorption liquid circulation part that extracts and distributes a part of the absorption liquid stored in the absorption liquid storage part; and
A gas supply for supplying the gas in which CO 2 or H 2 S is absorbed;
An absorption liquid component extraction section that makes the absorption liquid extracted in the absorption liquid circulation section counter-contact with the gas in the gas supply section;
The reclaiming device according to claim 1, further comprising: - 前記吸収液と前記蒸気とを気液接触させる充填層をさらに備えたことを特徴とする請求項1~5のいずれか一つに記載のリクレーミング装置。 The reclaiming device according to any one of claims 1 to 5, further comprising a packed bed for bringing the absorbing liquid and the vapor into gas-liquid contact.
- 前記吸収液貯留部より前記吸収液の一部を抜き出し揚上するポンプと、前記ポンプにより揚上された前記吸収液を上昇する前記蒸気に対向して流下させるノズルとを有することを特徴とする請求項1~6のいずれか一つに記載のリクレーミング装置。 It has a pump for extracting and lifting a part of the absorption liquid from the absorption liquid storage section, and a nozzle for causing the absorption liquid lifted by the pump to flow down against the rising vapor. The reclaiming device according to any one of claims 1 to 6.
- ガス中のCO2またはH2Sを吸収した吸収液の一部を貯留する工程と、貯留された前記吸収液を加熱する工程とを含むリクレーミング方法において、
貯留された前記吸収液の一部を流通させつつ気体と向流接触させる工程を含むことを特徴とするリクレーミング方法。 In a reclaiming method including a step of storing a part of an absorbent that has absorbed CO 2 or H 2 S in a gas, and a step of heating the stored absorbent.
A reclaiming method comprising a step of causing counterflow contact with a gas while circulating a part of the stored absorbent. - 貯留された前記吸収液の一部を循環させて前記吸収液を流通させる工程と、
加熱した前記吸収液の蒸気と循環される前記吸収液とを向流接触させる工程と、
を含むことを特徴とする請求項8に記載のリクレーミング方法。 Circulating a part of the stored absorbent and circulating the absorbent;
A countercurrent contact between the heated vapor of the absorbent and the circulated absorbent;
The reclaiming method according to claim 8, comprising: - 一部を循環される吸収液に、当該吸収液を加熱する温度よりも高温の乾燥蒸気を向流接触させる工程を含むことを特徴とする請求項9に記載のリクレーミング方法。 10. The reclaiming method according to claim 9, further comprising a step of bringing a part of the absorbent that is circulated into contact with dry steam having a temperature higher than a temperature at which the absorbent is heated in countercurrent.
- 貯留された前記吸収液の一部を抜き出して流通させる工程と、
外部で発生した蒸気を抜き出された前記吸収液に向流接触させる工程と、
を含むことを特徴とする請求項8に記載のリクレーミング方法。 Extracting and circulating a part of the stored absorbent, and
A step of bringing the vapor generated externally into countercurrent contact with the extracted liquid;
The reclaiming method according to claim 8, comprising: - 貯留された前記吸収液の一部を抜き出して流通させる工程と、
CO2またはH2Sが吸収される前記ガスを、抜き出された前記吸収液に向流接触させる工程と、
を含むことを特徴とする請求項8に記載のリクレーミング方法。 Extracting and circulating a part of the stored absorbent, and
Bringing the gas into which CO 2 or H 2 S is absorbed into countercurrent contact with the extracted absorption liquid;
The reclaiming method according to claim 8, comprising: - 貯留された前記吸収液をサンプリングし当該吸収液中の吸収液成分量を測定する工程と、
測定した吸収液成分量が所定量以下に至った場合に各前記工程を終了する工程と、
を含むことを特徴とする請求項8~12のいずれか一つに記載のリクレーミング方法。 Sampling the stored absorption liquid and measuring the amount of the absorption liquid component in the absorption liquid; and
A step of terminating each of the steps when the measured amount of the absorbent component reaches a predetermined amount or less;
The reclaiming method according to any one of claims 8 to 12, characterized by comprising: - 貯留された前記吸収液を加熱する工程は、
前記吸収液と蒸気とを非接触で熱交換させ、当該蒸気の蒸気圧力を所定圧力に保つ工程を含むことを特徴とする請求項8~13のいずれか一つに記載のリクレーミング方法。 The step of heating the stored absorption liquid includes:
The reclaiming method according to any one of claims 8 to 13, further comprising a step of exchanging heat between the absorption liquid and the steam in a non-contact manner and maintaining a steam pressure of the steam at a predetermined pressure. - 前記蒸気の蒸気圧力を2~3[kg/cm2G]に保つことを特徴とする請求項14に記載のリクレーミング方法。 The reclaiming method according to claim 14, wherein the vapor pressure of the vapor is maintained at 2 to 3 [kg / cm 2 G].
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US13/703,211 US9254462B2 (en) | 2009-10-19 | 2011-07-26 | Reclaiming apparatus and reclaiming method |
EP11821465.9A EP2612698A4 (en) | 2010-09-02 | 2011-07-26 | Reclaiming apparatus and reclaiming method |
CA2806691A CA2806691C (en) | 2010-09-02 | 2011-07-26 | Reclaiming apparatus and reclaiming method |
RU2013100167/05A RU2534099C2 (en) | 2009-10-19 | 2011-07-26 | Regeneration device and method of regeneration |
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